使用ES6模板文字:

Const url = ' ${location.protocol}//${location.hostname}${location.port?':'+location.port: "} '; . getelementbyid(“结果”)。innerText = url; < div id = "结果" > < / div >

你可以简化为:

Const url = ' ${location.protocol}//${location.host} '; . getelementbyid(“结果”)。innerText = url; < div id = "结果" > < / div >

ES6风格，具有可配置参数。

/**
 * Get the current URL from `window` context object.
 * Will return the fully qualified URL if neccessary:
 *   getCurrentBaseURL(true, false) // `http://localhost/` - `https://localhost:3000/`
 *   getCurrentBaseURL(true, true) // `http://www.example.com` - `https://www.example.com:8080`
 *   getCurrentBaseURL(false, true) // `www.example.com` - `localhost:3000`
 *
 * @param {boolean} [includeProtocol=true]
 * @param {boolean} [removeTrailingSlash=false]
 * @returns {string} The current base URL.
 */
export const getCurrentBaseURL = (includeProtocol = true, removeTrailingSlash = false) => {
  if (!window || !window.location || !window.location.hostname || !window.location.protocol) {
    console.error(
      `The getCurrentBaseURL function must be called from a context in which window object exists. Yet, window is ${window}`,
      [window, window.location, window.location.hostname, window.location.protocol],
    )
    throw new TypeError('Whole or part of window is not defined.')
  }

  const URL = `${includeProtocol ? `${window.location.protocol}//` : ''}${window.location.hostname}${
    window.location.port ? `:${window.location.port}` : ''
  }${removeTrailingSlash ? '' : '/'}`

  // console.log(`The URL is ${URL}`)

  return URL
}

const full = location.protocol + '//' + location.host;

以下是我使用的解决方案:

const result = `${ window.location.protocol }//${ window.location.host }`;

编辑:

要增加跨浏览器兼容性，请使用以下方法:

const result = `${ window.location.protocol }//${ window.location.hostname + (window.location.port ? ':' + window.location.port: '') }`;

出于某种原因，所有的答案都是多余的。这就是一切:

window.location.origin

更多细节可以在这里找到:https://developer.mozilla.org/en-US/docs/Web/API/window.location#Properties

Window.location.protocol + '//' + window.location.host